retroarch "Failed to save to" config

[revolution]

Hi everyone, Was wondering if someone could help me? I have been trying to get my n64 controller to work on retroarch, which i have mostly done but everytime i close out of retroarch my setting default to there original settings.
I have put this down to retroarch not saving the configuration on exit, even though it is set to save.
I have also tryed to manually save the configuration but keep getting the error "failed to save to" Users/User/LaunchBox/Emulators/RetroArch/retroach.cfg
It would help a ton if someone could help me get my configuration to save 

[scooter1974]

I'm going to assume that you are trying to set it up in the core you are using for N64. Have you tried going to the quick menu (while you have a game running) and going to the override section at the bottom? There you can save your config for that particular core, content directory or per game.

[revolution]

yes i have done that. It says when i start it up that the core override has been loaded but still all my mapped n64 settings have been reset to default